asyn-script

A library which implements a virtual machine to achieve continuation-like behavior in C++ and provides a scripting language in the form of C++ function calls.

wiki: https://github.com/ThinEureka/asyn-script/wiki

faq: https://github.com/ThinEureka/asyn-script/wiki/FAQ

AsynScriptAssist: https://github.com/ThinEureka/AsynScriptAssist

Login demo: The following code demonstrates how to use asyn-script to write asynchronous behaviors in a synchronous way. The following code is executed in a single thread without blocking it even when the login progress takes long time to finish. It achieves multiple code-flow without multi-threading, which you might notice could be achieved by co-rountine as well. This solution however is quite different from that of co-routine, and gains its own unique features and advantages for the introduction of a virtual mahcine. Full demo: https://github.com/ThinEureka/asyn-script/tree/master/demo/DemoLogin

asys::FunctionCode* login(ASYS_P(std::string, device_id))
{
	BEGIN_FUN(device_id){

		ASYS_VAR(bool, game_end);
  
		WHILE_NOT(game_end){ 
			ASYS_VAR(bool, success);    
			ASYS_VAR(std::string, user_id);   
			ASYS_VAR(std::string, access_token);

			CALL(platformLogin(), device_id) >>= {success, user_id, access_token};

			IF_NOT(success){ 
				CONTINUE;
			}END_IF;

			ASYS_VAR(std::string, session_id);       
			ASYS_VAR(std::string, gameserver_ip);
			CALL(userServerLogin(), user_id, access_token) >>= { success, session_id, gameserver_ip };

			IF_NOT(success){
				CONTINUE;
			}END_IF;

			ASYS_VAR(std::string, player_info);   
			CALL(gameServerLogin(), user_id, session_id, gameserver_ip) >>= { success, player_info };

			IF_NOT(success){
				CONTINUE;
			}END_IF;

			_CC{ 
				std::cout << "login-success: " << player_info.r() << std::endl;
			}CC_;

			_CC{       
				std::cout << player_info.r() << " is playing the game." << std::endl;
				asys_redo;
			}CC_;
		}END_WHILE;
	}END_FUN;
}